I need exactly the right amount of stimulation or nothing is getting done. It is extremely variable.

I find loud, fast/rhythmic music works best for me. Anything with a d-beat is generally solid, so metal (osdm, trad/speed, thrash, black) and punk (hardcore, crust) make up a chunk of my focus music, definitely not in the multiple sources category either, more of the "drown out everything else so I can only think of one thing" sort.

Same but I work from home with two elementary school aged kids during summer break, so I just suffer.